Sounding-boards for pianos.



Patented Jan. 6, 1914.

r H. J. EILERS.

SOUNDING BOARDS FOR PIANOS. APPLlOATION FILED 00122, 1912.

. w r a .4 L E i UNITED STATES PATENT OFFICE.

nann .1. mans, or 203mm), onneon.

soUNnme-noms r02. Pianos.

Specification (if Letters new.

Application filed October as, 1912. Serial No. 721,154.

To all whom it may concern:

Be it known that I, HENRY J. EILnRs, a citizen of the United States, residing at Portland, in the county of Multnomah and 5. the State of Oregon, have invented certain new and useful Improvements in Sounding- Boards for Pianos, of which the following is a specification.

'of the music is greatly increased.

The object of this invention is to provide a section on the line 3-3 of Fig. 2.

In the accompanying drawings is shown the rear frame work of a piano that carries the sounding-boards, string-plate'and plank. This frame consists of a base piece 1, an upper cross-bar 2, 3, which is carried by the upright posts 4. v Secured to the u per cross-bar 2 and uprights 4 is the pin-p ank 5 carrying the pins 6.

The primary sounding-board 7 is of suitable construction, supported by the frameg and has mounted upon it a plurality -o ribs 8. I

The secondary sounding-board 9 is mount- Ooplea of this patent may be obtained for from said primary sounding board,

an cents each, by umin; Washington, D. c."

ed parallel with the primary soundingboard, forming the inclosure 10, butdoea not coverthe entire frame, as is clearly shown in Fig. 1. Openings 11, of any suitable design are made in the secondary soundingboard, and mounted on said board are the ribs 12, spaced intermediate the ribs 8, but not passing over the openings 11.

It will be noticed in Fig. 2, that'the upright posts 4 are cut away so tact the secondarg sounding-board.

A. plurality 0 openings 13 connect the as not to eong Patented Jan. 0,1914.

space 10 with the above exterior of the frame. Ferrules 14 are placed at the head .of these openings to form apleasing" I claim as my mvntion:

, A dpiano' comprising a rimary soun boar a secondary-soun ing board a;

. clos'ure intermediate the sound boards forming a sounding chamber, and a closure for the top of said. sounding chamber, the top of which closure is a portion of the piano top, said closure having openings. lead mg from the, sounding chamber directly to..-

the said top of the piano and forming sounding passages communicating with the sounding chamber and outer atmosphere.

In testimony whereof I have hereunto so my hand in presence of two subscribing witnesses.

I HENRY J. EIIiEBS.

Witnesses:

Y STEPHENSON Sm'm,

NELLY'DALY.

m "cm a rea m, 

